Just installed and configured SQL Reporting Services 2008 with ConfigMgr. 2007 R2 SP2 this morning. Everything went smoothly except for one minor detail; I got an error in my mail subscription:
Failure sending mail: The message could not be sent to the SMTP server. The transport error code was 0×800ccc15. The server response was not available [...]

Converting the Configuration manager ASP reports to SRS reports (SQL Reporting Services) is a really easy task. Once you want to modify or create new the reports you need to a little more work. I create reports using these applications.

SQL Server Report Builder 1.0
SQL Server Report Builder 2.0 (requires SQL Server 2008)
Business [...]

In this post I’ll describe how you configure mail subscriptions with Configuration Manager 2007 R2. I assume that SQL Reporting Services is installed and configured on a remote database. I also assume that the Reporting Services Site system is configured in the Configuration Manager Administrator console.
Prerequisites

SQL Reporting Services requirements

Execution account. Windows user account with [...]